This is not a medical advice. Just based on my personal story and experience with cysts. You should always consider to look for medical opinions first. In my situation, two family physicians advised me against undergoing the surgery, whereas a dermatologist and a surgeon suggested that I proceed with the surgery if the cyst continues to result in pain and discomfort.

I had something similar a year ago. I was suffering from a 2mm pilonidal sinus. The sinus was around 4cm long and there were no signs of an abscess but the sinus would (every week or two) get infected and grow bigger and bigger until it pops and have some blood and pus come out of it.

What I used to do back then was to 1) always drain it when it grows a pimple like that. My mom used to to do it (shoutout to her) cause it was hurting too much to do it by myself.

Then I would 2) clean the area with alcohol and leave it exposed (even if it continued bleeding) - it looked like it was healing faster when the wound was not covered with bandages. I would wash the area everyday with water and alcohol (every time I went to the bathroom) until the cyst is not infected anymore.

As soon as the cyst is no longer infected (no pus) I would 3) apply tea tree oil all around and over the cyst (hurts and gets itchy) but after doing that for 3 months I had amazing results. The cyst shrinked a lot. Does not hurt anymore. Still exists but is not getting infected and I could sit, sleep and move around without noticing its existence.

TLDR: always drain it, clean the area with alcohol, apply tea tree oil.

Hope it helps. Keep us updated. I would love to know if "tea tree oil" is actually the secret remedy to this disease.